Pith Number

pith:R7EFESB7

pith:2013:R7EFESB7WIS5O6DJNZ2LXQM5WQ

not attested not anchored not stored refs pending

High-n Hydrogen Recombination Lines from the First Galaxies

Abraham Loeb, Evan Rule, Vladimir Strelnitski

arxiv:1308.6215 v1 · 2013-08-28 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R7EFESB7WIS5O6DJNZ2LXQM5WQ}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:47:57.363929Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8fc852483fb225d778696e74bbc19db430df0629d74d87b1cbdae11e86d7cc5f

Aliases

arxiv: 1308.6215 · arxiv_version: 1308.6215v1 · doi: 10.48550/arxiv.1308.6215 · pith_short_12: R7EFESB7WIS5 · pith_short_16: R7EFESB7WIS5O6DJ · pith_short_8: R7EFESB7

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/R7EFESB7WIS5O6DJNZ2LXQM5WQ \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 8fc852483fb225d778696e74bbc19db430df0629d74d87b1cbdae11e86d7cc5f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ce019828a3948cc73f5e94349c09f3508bb57568ff6890dbbb877112eaef2102",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-08-28T16:52:33Z",
    "title_canon_sha256": "8c1199b4c8a9f102682a6a17a06ddfd6f4190269cfd97182e38bd1b5ce3450e9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.6215",
    "kind": "arxiv",
    "version": 1
  }
}